YOU SAID:
when the cows start mooing
INTO JAPANESE
牛が鳴き始めるとき
BACK INTO ENGLISH
when the cows start barking
INTO JAPANESE
牛が吠え始めるとき
BACK INTO ENGLISH
when the cow starts barking
INTO JAPANESE
牛が吠え始めるとき
BACK INTO ENGLISH
when the cow starts barking
That didn't even make that much sense in English.